RPICT7V1 (This covers for both hardware versions 2 and 3)
RPICT7V1 Version 2 and 3 are no longer produced. Use Version 5 or 6 instead. Get in touch with us if you need to order some version 3 for stacking onto existing version 3.
This page is for board specific information. More information can be found on the generic page for RPICT series.
- 7 AC current sensors.
- 1 AC Voltage sensor.
- Measure RMS Current and Voltage, Active power, Apparent Power, Power Factor.
- Fit on Raspberrypi 4 holes mounting pattern.
- AtMega328 Mcu (Arduino UNO)
- MCP3208 ADC
- Stackable with itself, RPICT8 and RPICT4V3.
Compatibility
Version | Compatible? |
---|---|
Raspberrypi 1 A | No |
Raspberrypi 1 B+ | Yes |
Raspberrypi 2 B | Yes |
Raspberrypi 3 B | Yes |
Raspberrypi 3 B+ | Yes |
Raspberrypi 4 B | Yes |
- Asus Tinkerboard has been reported to work with RPICT units. Note we wont be able to provide support for the Tinkerboard.
Recommended sensors
- AC Current sensor:
- SCT-013-000
- SCT-019
- SCT-006
- AC Voltage sensor:
- UK: 77DB-06-09
- EU: 77DE-06-09
- US: 77DA-10-09
VOLTAGE OUTPUT CT ARE NOT COMPATIBLE WITH THIS BOARD.
Stacking Configuration
General stacking information is described in the RPICT stacking page.
RPICT_Stacking
Software Configuration
Legacy firmware
For any units ordered before the 1st of February 2022 the firmware version is version 3.
Please upgrade to firmware version 4.
Configuration via web interface
First make sure the lcl-package is installed if not done already.
wget lechacal.com/RPICT/tools/lcl-rpict-package_latest.deb
sudo dpkg -i lcl-rpict-package_latest.deb
Now starts a server instance on the Raspberrypi using.
lcl-server.sh
You can now access the Raspberrypi configuration server if you point your browser to the link below
You can now edit the configuration.
An online version of this web interface exists on this link below.
http://lechacal.com/RPICT/config/generator/latest/index.html
Because the RPICT7V1 version3 does not support auto reset you must use press the white button just after having clicked on the upload to device button.
Configuration via command line
The documentation for serial configuration can be found on this page.
Over_Serial_Configuration_-_Sketch_4
The tool to upload the configuration is called lcl-rpict-config.py. To read the configuration use
lcl-rpict-config.py -a
This produce the /tmp/rpict.conf file containing the configuration of the device.
One can modify this file and write it back using
lcl-rpict-config.py -a -w /tmp/rpict.conf
Files
Default Sketch
Simple Python Example
The example python script below will work well with the default configuration.
import serial
ser = serial.Serial('/dev/ttyAMA0', 38400)
try:
while 1:
# Read one line from the serial buffer
line = ser.readline()
# Remove the trailing carriage return line feed
line = line[:-2]
# Create an array of the data
Z = line.split(' ')
# Print it nicely
if len(Z)>15:
print ("----------")
print ("Vrms:\t%s" % Z[15])
print (" \tCT1\tCT2\tCT3\tCT4\tCT5\tCT6\tCT7")
print ("RealPower:\t%s\t%s\t%s\t%s\t%s\t%s\t%s" % (Z[1], Z[2], Z[3], Z[4], Z[5], Z[6],$
print ("Irms :\t%s\t%s\t%s\t%s\t%s\t%s\t%s" % (Z[8], Z[9], Z[10], Z[11], Z[12], Z[$
except KeyboardInterrupt:
ser.close()
To run this first of all make sure you have python-serial package installed
sudo apt-get install python3-serial
Then run the command below to download the script.
wget lechacal.com/RPICT/example/RPICT7V1_DEMO.py.zip
unzip RPICT7V1_DEMO.py.zip
and run it using
python RPICT7V1_DEMO.py
Data Output
Using the manufacture firmware the data output is:
NodeID RP1 RP2 RP3 RP4 RP5 RP6 RP7 Irms1 Irms2 Irms3 Irms4 Irms5 Irms6 Irms7 Vrms
RP1 is Real Power 1 from CT1 Irms is the rms current on CT1 Vrms is the rms voltage
Real Powers are computed using the following rules:
RealPower1 -> CT1 & V1
RealPower2 -> CT2 & V1
... and so on.
These rules can be modified in the configuration if needed.
Other output type can be streamed out. This should be configured in the unit.
All outputs type available are
- Vrms (V)
- Irms (mA)
- Real Power (W)
- Apparent Power (W)
- Power Factor
- Estimated Power
Emoncms Config (Emonhub)
Make sure you read this first.
For default configuration. Used as single board only (not stacked).
[[/11|11]]
nodename = my_RPICT7V1
hardware = RPICT7V1
[[[rx]]]
names = RP1, RP2, RP3, RP4, RP5, RP6, RP7, Irms1, Irms2, Irms3, Irms4, Irms5, Irms6, Irms7, Vrms
datacode = 0
scales = 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
units =W,W,W,W,W,W,W,mA,mA,mA,mA,mA,mA,mA,V
Enclosure
Enclosures kit are available as a 3D printed product. Link to the shop.
Both Raspberrypi 3 and 4 format are available.
Related Pages
Howto setup Raspbian for serial read
Calibration VCAL ICAL PHASECAL